Four-chamber inflatable kayak

ABSTRACT

A four-chamber inflatable kayak comprises an upper chamber, a lower chamber, connecting portions as well as two side chambers and two side coverings. The upper chamber and the lower chamber are streamlined with a wide center and narrow ends, and the outer portion of the two ends of the upper chamber and the lower chamber is connected to each other by means of a connecting portion. The connecting portion has two separate compartments that are separated from each other. Both ends of the upper chamber and the lower chamber are accommodated in the separate compartments in the connecting portion, so that a cavity with accommodating space is formed between the upper chamber and the lower chamber. The upper chamber comprises a cockpit hole disposed in the middle. The cockpit hole is communicated with the cavity.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application of International Patent Application No. PCT/CN2022/085600, filed on Apr. 7, 2022, the content of all of which is incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to a technical field of water sports equipment and, in particular, to a four-chamber inflatable kayak.

BACKGROUND

With the improvement of living standards, more and more people like to play on the sea, and inflatable kayaks are popular because of their light weight, small size and ease of movement on the water.

Most of the inflatable kayaks on the market today are single-chamber inflatable kayaks or dual-chamber inflatable kayaks. Single-chamber kayaks are not easy for people to maintain balance and stability on the water. In addition, once the kayak encounters hard objects, spiky objects and other objects that puncture the chamber, the kayak will sink due to water leakage and the safety factor is low. Existing dual-chamber kayaks are mostly a combination of upper and lower chambers, having a ride space between them, allowing people to ride in the hull to improve the poor stability of a single-chamber hull. However, due to the structural limitations of the dual-chamber kayaks, the space for people's legs to rest inside the kayak is limited and the comfort is poor. In addition, although inflatable kayaks with two chambers offer more safety than those with single chamber, the improvement is limited.

SUMMARY

The purpose of this application is to remedy the above-mentioned shortcomings of the prior art and to provide a four-chamber inflatable kayak with a higher safety factor and more comfort.

Embodiments of the present disclosure can be realized by the following technical solutions.

A four-chamber inflatable kayak, comprising: An upper chamber, a lower chamber, two connecting portions, two side chambers and two side coverings.

The upper chamber and the lower chamber are streamlined with a wide center and narrow ends, and the outer portion of the two ends of the upper chamber and the lower chamber is connected to each other by means of a connecting portion. The connecting portion has two separate compartments that are separated from each other. Both ends of the upper chamber and the lower chamber are accommodated in the separate compartments in the connecting portion, so that a cavity with accommodating space is formed between the upper chamber and the lower chamber. The upper chamber comprises a cockpit hole disposed in the middle. The cockpit hole communicates with the cavity.

The upper chamber and the lower chamber are connected on each side by means of the side coverings, and the two side chambers are removably accommodated in the cavity and are removably connected to the upper chamber, the lower chamber, and the side coverings, respectively.

Further, the connecting portion of the side chamber with the side covering, the upper chamber and the lower chamber comprises a plurality of connecting gaps. Each of the side chamber is connected with a positioning rubber strip respectively at the two sides connecting the upper chamber and the lower chamber. The positioning rubber strip is a side strip for seating in the connecting gap so that the chamber is removably connected to the upper chamber, the lower chamber and the side covering.

Further, the upper chamber further comprises an upper chamber main body, a first air nozzle, a plurality of enclosed rubber strips and a first airtight strip. The cockpit hole is located in the middle of the upper chamber main body. The cockpit hole and the perimeter of the upper chamber main body is sealed by means of the first airtight strip. A plurality of enclosed rubber strips surround the cockpit hole. The upper chamber main body and a plurality of the first airtight strips together enclose a separate air chamber. The first air nozzle penetrates the separate air chamber of the upper chamber.

Further, the lower chamber comprises a lower chamber main body, a second air nozzle and a plurality of second rubber strips. The surrounding sides of the lower chamber main body are sealed by means of second airtight strips so that the lower chamber main body and the second airtight strips together enclose a separate air chamber and the second air nozzle penetrates into the separate air chamber of the second chamber.

Further, the two connecting portions are connected at the outer of the two ends of the upper chamber and the lower chamber, respectively. The connecting portion comprises a first compartment, ribs and a second compartment. The first compartment and the second compartment are separate compartments with separate accommodating chambers from each other. The ends of the upper chamber and the lower chamber are respectively accommodated in the first compartment and the second compartment. The ribs are a plurality of interlacing ribs with supporting functions. The ribs are located between the first compartment and the second compartment.

Further, the connecting portion further comprises a plurality of third airtight strips. The third airtight strips are connected to the perimeter of the upper chamber and the lower chamber, firmly accommodating the ends of the upper chamber and the lower chamber in the compartment of the connecting portion.

Further, the side chamber further comprises a side chamber main body, a fourth airtight strip and a third air nozzle. The perimeter of the side chamber main body is sealed by means of the fourth airtight strip. The side chamber main body together with the fourth airtight strip and the positioning rubber strip together enclose a separate air chamber to achieve the independence of the air chamber of the side chamber, and the third air nozzle penetrates into the separate air chamber of the side chamber.

Further, the height between the side chamber and the two sides connected to the upper chamber and the lower chamber is 20 cm˜25 cm, respectively. The two sides of the side chamber are connected to the sides of the upper chamber and the lower chamber, respectively, and the cavity of the middle part of the upper chamber and the lower chamber is shaped.

Further, the side covering is made of waterproof PVC tarpaulin. The side covering is single layer leather. The side covering is sealed to the sides of the upper chamber and the lower chamber respectively, and to the upper chamber, the lower chamber and the connecting portion respectively, so that the cavity forms a chamber sealed all around and communicated at the top with the cockpit hole.

Further, the side covering is provided with a side covering zipper in the middle, and the side covering zipper is made of a material with a waterproof effect.

Embodiments of the present disclosure provide a four-chamber inflatable kayak with at least the following beneficial effects:

The utility model provides a four-chamber inflatable kayak, comprising an upper chamber, a lower chamber and two side chambers, wherein, the two side chambers are connected to the middle of both sides of the upper and lower chambers, so that there is enough support space between the upper and lower chambers, and the upper chamber is provided with a cockpit hole, so that people can ride in the hull through the cockpit hole, increasing the leg space for people to ride in the hull, with the advantages of comfortable riding and conducive to people's balance and stability on the water.

A four-chamber inflatable kayak of the utility model is provided with a side covering on the outside, wherein, the side covering is a protective cover to protect the chamber from being scratched, and the side covering is a structure that can be opened by a zipper, which improves the safety of the inflatable kayak and makes it easy to clean the dirt in the kayak.

The utility model adopts the structural design of four chambers, and the two side chambers and the upper and lower chambers are respectively installed in the side covering by means of removable connection. The side chambers can be removed from the hull to act as flotation boards in the event of a leak in either of the upper or lower chambers. In addition, even in the event of multiple chamber leaks, floating can be accomplished with one chamber safely, which has the advantage of simple construction, easy removal of the side chambers and high safety.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a front view of a four-chamber inflatable kayak of the present disclosure;

FIG. 2 is a schematic diagram of the A-A section as shown in FIG. 1 ;

FIG. 3 is a schematic diagram of a top view of a four-chamber inflatable kayak of the present disclosure;

FIG. 4 is a schematic diagram of an upward view of a four-chamber inflatable kayak of the present disclosure;

FIG. 5 is a schematic diagram showing the inner structure of the connecting portion of the present disclosure;

FIG. 6 is a schematic diagram of a front view of a four-chamber inflatable kayak of the present disclosure in a state without side coverings fitted;

FIG. 7 is a schematic diagram showing the structure of the side chamber of the present disclosure;

FIG. 8 is a schematic diagram of the B-B section as shown in FIG. 7 ; and

FIG. 9 is a partial enlarged drawing of position C as shown in FIG. 2 .

REFERENCE NUMBERS IN THE FIGURES

-   -   1—Upper chamber; 11—Upper chamber main body; 12—Hand grip;         13—Connecting ring; 14—Elastic rope; 15—First air nozzle;         16—Cockpit hole; 17—Enclosed rubber strip; 18—First airtight         strip;     -   2—Lower chamber; 21—Lower chamber main body; 22—Stern rudder;         23—Second air nozzle; 24—Second airtight strip;     -   3—Connecting portion; 31—First compartment; 32—Rib; 33—Second         compartment; 34—Third airtight strip;     -   4—Side chamber; 41—Side chamber main body; 42—Fourth airtight         strip; 43—Positioning rubber strip; 44—Third air nozzle;     -   5—Side covering; 6—Side covering zipper; 7—Cavity; 8—Connecting         gap.

DETAILED DESCRIPTION

Hereinafter, the present disclosure will be described further with reference to the preferred embodiments and with reference to the accompanying drawings.

In addition, the various components on the drawing are enlarged (thick) or reduced (thin) for the convenience of understanding, but this practice is not intended to limit the scope of protection of the present disclosure.

Words importing the singular number include the plural and vice versa.

In the description of the embodiments of the present disclosure, it should be noted that, the orientation or positional relationship indicated by the terms “upper,” “lower,” “inner,” “outer,” etc., is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship conventionally placed when the product is used, is merely for the convenience of describing the present disclosure and the simplified description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, constructed and operated in a particular orientation, and therefore not to be construed as a limitation of the present disclosure. In addition, in the description of the present disclosure, in order to distinguish different cells, the present description uses words of first, second, etc., but these are not limited by the order of manufacture, nor are it to be understood as indicating or implying relative importance, which may differ from the following detailed description of the present disclosure and the claims.

The words in the description are used for the purpose of illustrating the embodiments of the present disclosure and are not intended to limit the present disclosure. It should also be noted that, unless expressly specified and defined otherwise, the terms “set,” “attached,” and “connected,” are to be construed broadly, for example, may be fixedly connected, may be detachably connected, or integrally connected; may be mechanically connected, may be directly attached, may also be indirectly connected by an intermediate medium, may be internal communication of the two elements. It will be understood by those skilled in the art that the foregoing is a specific meaning in the present disclosure.

FIG. 1 is a schematic diagram of a front view of a four-chamber inflatable kayak of the present disclosure and FIG. 2 is a schematic diagram of the A-A section as shown in FIG. 1 . A four-chamber inflatable kayak, as shown in FIGS. 1 and 2 , with the orientation shown in FIG. 1 as an example comprises an upper chamber 1, a lower chamber 2, connecting portions 3 as well as two side chambers 4 and two side coverings 5. The upper chamber 1 and the lower chamber 2 are streamlined with a wide center and narrow ends, and the outer portion of the two ends of the upper chamber 1 and the lower chamber 2 is connected to each other by means of a connecting portion 3. The connecting portion 3 has two separate compartments that are separated from each other. Both ends of the upper chamber 1 and the lower chamber 2 are accommodated in the separate compartments in the connecting portion 3, so that a cavity 7 with accommodating space is formed between the upper chamber 1 and the lower chamber 2. The upper chamber 1 and the lower chamber 2 are connected on each side by means of the side coverings 5. The two side chambers 4 are removably accommodated in the cavity 7 and removably connected to the upper chamber 1, the lower chamber 2 and the side covering 5, respectively. The upper chamber 1 comprises a cockpit hole 16 disposed in the middle. The cockpit hole 16 communicates with the cavity 7, allowing people to ride in the cavity 7 through the cockpit hole 16 to ensure their safety.

As the side covering 5 is connected to the sides of the upper chamber 1, the lower chamber 2 respectively, so that when the side chamber 4 is installed in a position against the side covering 5, a plurality of connecting gaps 8 appear at the connection of the side chamber 4 to the side covering 5, the upper chamber 1, the lower chamber 2. Each of the side chamber 4 is connected with a positioning rubber strip 43 respectively at the two sides connecting the upper chamber 1 and the lower chamber 2. The positioning rubber strip 43 is a side strip for seating in the connecting gap 8 so that the chamber 4 can be positioned between the upper chamber 1 and the lower chamber 2, and so that the chamber 4 can be detachably removed from the upper chamber 1 and the lower chamber 2 by means of chamber inflation and deflation.

Specifically, FIG. 3 is a schematic diagram of a top view of a four-chamber inflatable kayak of the present disclosure. As shown in FIG. 3 , the upper chamber 1 comprises an upper chamber main body 11, a first air nozzle 15 and a plurality of first airtight strips. The cockpit hole 16 is located in the middle of the upper chamber main body 11. The cockpit hole 16 and the perimeter of the upper chamber main body 11 is sealed by means of the first airtight strip 18. The upper chamber main body 11 and a plurality of first airtight strips 18 together enclose a separate air chamber for achieving the independence of the air chamber of the upper chamber 1 and for facilitating the rapid inflation of the upper chamber 1 of a single separate air chamber. The first air nozzle 15 penetrates the separate air chamber of the upper chamber 1. When it is used, gas is filled into the upper chamber main body 11 via the first air nozzle 15, so that the upper chamber main body 11 is full in its entirety, and when it is not used, the gas can be discharged via the first air nozzle 15.

In some embodiments, the upper chamber 1 further comprises a plurality of enclosed rubber strips 17, around which the cockpit hole 16 is surrounded by enclosed rubber strips 17, alternatively, the enclosed rubber strips 17 may also be rear mounted fixed waterproof aprons for blocking splashes during use and reducing the possibility of splashes entering the cavity 7 through the cockpit hole 16. In some embodiments, the upper chamber 1 is provided with a plurality of hand grips 12 for easy handling of the inflatable kayak.

In some embodiments, the upper chamber 1 is further provided with a plurality of connecting rings 13 and an elastic rope 14, wherein, a plurality of the connecting rings 13 can be located at one or both ends of the upper chamber 1 and the elastic rope 14 passes through a plurality of the connecting rings 13 to form a mesh structure, allowing the rider to secure the belongings carried by him/her to the upper chamber 1 by means of the elastic rope 14.

FIG. 4 is a schematic diagram of an upward view of a four-chamber inflatable kayak of the present disclosure. As shown in FIG. 4 and FIG. 3 above, the lower chamber 2 comprises a lower chamber main body 21, a second air nozzle 23 and a plurality of second airtight strips 24. The four sides of the lower chamber main body 21 are sealed by means of the second airtight strip 24 so that the lower chamber main body 21 and the second airtight strip 24 together enclose a separate air chamber for achieving the independence of the air chamber of the lower chamber 2 and for facilitating the rapid inflation of the lower chamber 2 of a single separate air chamber.

The second air nozzle 23 penetrates the air chamber of the lower chamber 2. When it is used, gas is filled into the lower chamber main body 21 via the second air nozzle 23, so that the lower chamber main body 21 is full in its entirety, and when it is not used, the gas can be discharged via the second air nozzle 23.

The lower chamber 2 is provided with a rudder 22 at its stern for stabilizing the direction of navigation of the inflatable kayak.

In this embodiment, the connection portion 3 is provided with two, and the two connection portions 3 are connected to the outer of the two ends of the upper chamber 1 and the lower chamber 2 respectively. The connecting portions 3 have two compartments which are separated from each other. When the two ends of the upper chamber 1 and the lower chamber 2 are accommodated in the two separate compartments of the connecting portion 3, the upper chamber 1 and the lower chamber 2 are connected in the form of an overhang center with the two ends separated, in order to increase the accommodating space between the upper and lower chambers.

Specifically, FIG. 5 is a schematic diagram showing the inner structure of the connecting portion 3 of the present disclosure. As shown in FIG. 5 , the connecting portion 3 comprises a first compartment 31, ribs 32 and a second compartment 33. The first compartment 31 and the second compartment 33 are separate compartments with separate accommodating chambers from each other, for accommodating the ends of the upper chamber 1 and the lower chamber 2 respectively. The ribs 32 are a plurality of interlacing ribs with supporting functions. The ribs 32 are located between the first compartment 31 and the second compartment 32, for supporting the shaping of the first compartment 31 and the second compartment 32.

In some preferred embodiments, the connecting portion 3 is streamlined with a sharp tip for reducing the resistance to water flow when the inflatable kayak is in motion on the water and improving the glide of the inflatable kayak.

The connecting portion 3 further comprises a plurality of third airtight strips 34. The third airtight strips 34 are connected to the perimeter of the upper chamber 1 and the lower chamber 2, so that the ends of the upper chamber 1 and the lower chamber 2 can be firmly accommodated in the compartment of the connecting portion 3.

The side covering 5 is made of waterproof PVC tarpaulin. The side covering 5 is single layer leather. The side covering 5 can be sealed to the sides of the upper chamber 1 and the lower chamber 2 respectively by means of hot compression or glue, and to the upper chamber 1, the lower chamber 2 and the connecting portion 3 respectively, so that the cavity 7 forms a chamber sealed all around and communicated at the top with the cockpit hole 16. In addition, it also can be used as a protective cover for the sides of the hull.

In some preferred embodiments, the side covering 5 is provided with a side covering zipper 6 in the middle, and the side covering zipper 6 is made of a material with a waterproof effect, for opening the side covering 5 by means of the side covering zipper 6, in order to clean dirt inside the cavity 7, and prevent water splash into the cavity 7 through the side covering zipper 6.

FIG. 6 is a schematic diagram of a front view of a four-chamber inflatable kayak of the present disclosure in a state without side coverings fitted. As shown in FIG. 6 , the side chamber 4 is located inside the cavity 7, and the two sides of the side chamber 4 are connected to the sides of the upper chamber 1 and the lower chamber 2, respectively. The height between the side chamber 4 and the two sides connected to the upper chamber 1 and the lower chamber 2 is 20 cm˜25 cm, respectively, for shaping the cavity 7 of the middle part of the upper chamber 1 and the lower chamber, obtaining enough space for the leg to rest during riding.

Specifically, FIG. 7 is a schematic diagram showing the structure of the side chamber of the present disclosure and FIG. 8 is a schematic diagram of the B-B section as shown in FIG. 7 . As shown in FIG. 7 and FIG. 8 , the side chamber 4 further comprises a side chamber main body 41, a fourth airtight strip 42 and a third air nozzle 44. The perimeter of the side chamber main body 41 is sealed by means of the fourth airtight strip 42. The positioning rubber strip 42 is fixedly connected to two sides of the side chamber 4 connecting to the upper chamber 1 and the lower chamber 2 respectively. The side chamber main body 41 together with the fourth airtight strip 42 and the positioning rubber strip 43 together enclose a separate air chamber to achieve the independence of the air chamber of the side chamber 4, and the third air nozzle 44 penetrates into the separate air chamber of the side chamber 4, for inflating and deflating the side chamber 4.

The material of the upper chamber main body 11, the lower chamber main body 21 and the side chamber main body 41 is made of wire drawn material. Preferred in this embodiment is a wire-drawn pad. The wire-drawn pad is an article made of soft rubber-like plastic on both top and bottom sides, with dense, free and fixed length filaments in the middle, and the filaments connected with soft rubber on both top and bottom sides. Its exterior is sealed and the filamentous structure of the interior, when inflated, will ensure the flatness of the two soft plastic surfaces and the overall strength against air pressure.

The first airtight strip 18, the second airtight strip 24, the third airtight strip 34 and the fourth airtight strip 42 are preferably made of tarpaulin, which is a cloth product with a textile fiber mesh interspersed in the middle and wrapped on both sides by a soft rubber thermally compressed with plastic soft rubber, which can be used to seal the four sides of the wire-drawn pad by hot compression or glue.

A detailed explanation of how the side chamber 4 can be detachably accommodated in the cavity 7 is given below by means of FIG. 9 :

FIG. 9 is a partial enlarged drawing of position C as shown in FIG. 2 . As shown in FIG. 9 , the side chamber 4 and the upper chamber 1 and the lower chamber 2 are not made to be bonded. When the side chamber 4 is fitted in place, the side chamber 4, the side covering 5 and the upper chamber 1 and the lower chamber 2 are closely fitted and form a triangular blank area of the connecting gap 8. The positioning rubber strip 43 of the side chamber 4 is stuck into the connecting gap 8 and the positioning rubber strip 43 has a positioning effect when the side chamber 4 is inflated, preventing the side chamber 4 from being dislodged during normal use.

In the event of a leak in either one of the upper chambers 1 or the lower chambers 2, the side chamber 4 can be easily removed from the hull and used to lay underneath as a pontoon for rescue needs. In addition, it is also possible to make the side chambers 4 removable from the kayak by deflating the side chambers 4 for easy cleaning.

In some embodiments it is conceivable that the side chambers 4 on both sides may also be connected to the upper chamber 1 and the lower chamber 2 respectively by means of a fixed connection. The side chambers 4 can also be removed from the hull in the event of a leak in either one of the upper chambers 1 or the lower chambers 2. The way in which the side chambers 4 are connected to the upper chamber 1 and lower chamber 2 respectively is not further limited here, but such fixed connection is less practical and convenient than a detachable connection, as the side chambers 4 are not easily detachable from the hull by means of a fixed connection.

The above has been described in detail with respect to the specific embodiments of the present disclosure. It will be apparent to those skilled in the art that various modifications and adaptations may be made to the present disclosure without departing from the principles of the present disclosure, which are also intended to be within the scope of the appended claims. 

1. A four-chamber inflatable kayak, comprising: an upper chamber, a lower chamber, two connecting portions, two side chambers and two side coverings, wherein the upper chamber and the lower chamber are streamlined with a wide center and narrow ends, and an outer portion of two ends of the upper chamber and the lower chamber is connected to each other by means of a connecting portion, each connecting portion has two separate compartments that are separated from each other, both ends of the upper chamber and the lower chamber are accommodated in separate compartments in the connecting portion, so that a cavity with accommodating space is formed between the upper chamber and the lower chamber, the upper chamber comprises a cockpit hole disposed in a middle, and the cockpit hole is communicated with the cavity; and the upper chamber and the lower chamber are connected on each side by means of side coverings, and the two side chambers are removably accommodated in the cavity and are removably connected to the upper chamber, the lower chamber, and the side coverings, respectively.
 2. The four-chamber inflatable kayak according to claim 1, wherein: the connecting portion of the side chamber with the side covering, the upper chamber and the lower chamber comprises a plurality of connecting gaps, each of the side chamber is connected with a positioning rubber strip respectively at two sides connecting the upper chamber and the lower chamber, the positioning rubber strip is a side strip for seating in the connecting gap so that the chamber is removably connected to the upper chamber, the lower chamber and the side covering.
 3. The four-chamber inflatable kayak according to claim 1, wherein: the upper chamber further comprises an upper chamber main body, a first air nozzle, a plurality of enclosed rubber strips and a first airtight strip, the cockpit hole is located in a middle of the upper chamber main body, the cockpit hole and perimeter of the upper chamber main body is sealed by means of the first airtight strip, a plurality of enclosed rubber strips surround the cockpit hole, the upper chamber main body and a plurality of the first airtight strips together enclose a separate air chamber, and the first air nozzle penetrates the separate air chamber of the upper chamber.
 4. The four-chamber inflatable kayak according to claim 1, wherein: the lower chamber comprises a lower chamber main body, a second air nozzle and a plurality of second rubber strips, and surrounding sides of the lower chamber main body are sealed by means of second airtight strips so that the lower chamber main body and the second airtight strips together enclose a separate air chamber and the second air nozzle penetrates into the separate air chamber of the second chamber.
 5. The four-chamber inflatable kayak according to claim 1, wherein: the two connecting portions are connected at an outer of the two ends of the upper chamber and the lower chamber, respectively, the connecting portion comprises a first compartment, ribs, and a second compartment, the first compartment and the second compartment are separate compartments with separate accommodating chambers from each other, the ends of the upper chamber and the lower chamber are respectively accommodated in the first compartment and the second compartment, the ribs are a plurality of interlacing ribs with supporting functions, and the ribs are located between the first compartment and the second compartment.
 6. The four-chamber inflatable kayak according to claim 1, wherein: the connecting portion further comprises a plurality of third airtight strips, the third airtight strips are connected to a perimeter of the upper chamber and the lower chamber, firmly accommodating the ends of the upper chamber and the lower chamber in the compartment of the connecting portion.
 7. The four-chamber inflatable kayak according to claim 2, wherein: the side chamber further comprises a side chamber main body, a fourth airtight strip, and a third air nozzle, perimeter of the side chamber main body is sealed by means of the fourth airtight strip, and the side chamber main body together with the fourth airtight strip and the positioning rubber strip together enclose a separate air chamber to achieve independence of the air chamber of the side chamber, and the third air nozzle penetrates into the separate air chamber of the side chamber.
 8. The four-chamber inflatable kayak according to claim 2, wherein: height between the side chamber and the two sides connected to the upper chamber and the lower chamber is 20 cm˜25 cm, respectively, two sides of the side chamber are connected to the sides of the upper chamber and the lower chamber, respectively, and the cavity of a middle part of the upper chamber and the lower chamber is shaped.
 9. The four-chamber inflatable kayak according to claim 1, wherein: the side covering is made of waterproof PVC tarpaulin, the side covering is single layer leather, the side covering is sealed to the sides of the upper chamber and the lower chamber respectively, and to the upper chamber, the lower chamber and the connecting portion respectively, so that the cavity forms a chamber sealed all around and communicated at the top with the cockpit hole.
 10. The four-chamber inflatable kayak according to claim 1, wherein: the side covering is provided with a side covering zipper in the middle, and the side covering zipper is made of a material with a waterproof effect. 